The Tactile Feedback Device (TFD®) steering unit is a key component of fully electric and electro-hydraulic Steer-by-Wire (SbW) systems. These devices provide an integrated solution that combines bearing support, steering position sensing, communication and continuously variable resistive steering torque, delivering high-fidelity tactile feedback and maximum control to the operator. The resistive steering feedback is fully programable, with custom algorithms available based on equipment operating conditions.
The LORD TFD® is a multifunction unit, providing both incredibly smooth steering feel (through the use of Magnetically Responsive (MR) technology) and reliable and redundant steering control signals (including CAN functionality). Our TFD steering unit is maintenance free and will never require inspection or adjustment during the expected service life. Also, there are very few moving parts in the TFD which greatly enhances durability. All of this adds up to a compact, robust, low power, easy-to-install, and maintenance-free design.
Where are Tactile Feedback Devices used?
We have been a pioneer in SbW steering units since 1999, when the first device began production on a forklift truck application. With more than half a million devices in the field, Parker Lord has a long history of providing reliable and safe TFD steering units to OEMs in various markets including: Marine (Helm Controls), Material Handling (Forklifts), Turf (Greens Mowers), Off-Highway (Agricultural Tractors and Construction Equipment) and Small Industrial Vehicles (Floor Sweepers, Zamboni, etc.).
Standard Features:
• 2-channel dual-redundant, non-contact, Hall Effect steering sensor
• Sensor output (three options)
• Standard digital (PWM) multi-rotational code
• Analog code suitable for controllers with limited digital I/O
• Analog multi-rotational code with no discontinuities in the signal
• Shaft connection (two standard options)
• Flat
• Cross-drilled
• Deutsch DTM04-6P connector
• 20 AWG wire
• 200mm cable length
• 10 Ohm coil
Customized Solutions:
We have designed and manufactured various customized devices, which are tuned to specific customer requirements. These designs may include the following unique features:
• Quad-Redundant steering sensors
• Housings
• Shaft connections
• Cable connections and length
• Coil resistance
• Sensor outputs
• CAN-bus enabled devices
• Enables more sophisticated steering algorithms using various vehicle inputs
• Enhances the steering feel of a vehicle in ways not possible with previous technology
